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| Re: Please help - is my sensor damaged/dirty? |
It looks mostly like sensor dust to me. I haven't seen anything like the streaks myself, but all the dots look like simple dust spots. You wouldn't be able to see them with the naked eye; you could try a loupe if you'd like, but that seems overkill to me.
Sensor cleaning is a routine and simple procedure, and is necessary for just about everyone from time to time. I live near the coast and frequently change lenses in windy conditions, so I need to clean mine after most of my trips (multiple days shooting).
I use Photographic Solutions pre-moistened sensor swabs to clean my sensor: http://www.bhphotovideo.com/c/buy/Shop-by-Brand-Photographic-Solutions/ci/4/phd/4291276201/N/4294255798
I haven't had any issues, but it does usually take me a few swabs to get rid of every dust speck.
Others swear by dry cleaning; here's a great video illustrating how LensRentals cleans their sensors - you'd probably be well-served by following their advice, as they do this VERY often. http://www.lensrentals.com/blog/2010/04/how-to-clean-a-camera-sensor